Interspire bounce processing add-on for PowerMTA

Interspire is perhaps the most popular email marketing tool. Used with PowerMTA, it becomes a powerful and complete email solution. But the two were not integrated with regard to bounce processing. Until now. Postmastery regularly set up turn-key email systems based on Interspire and PowerMTA. The systems were complemented by a POP/IMAP server so bounce […]

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Categories: PowerMTA

DKIM recipe for PowerMTA

DomainKeys, and it’s successor DKIM, are important email authentication techniques. Based on cryptography, they are more secure than SPF and Sender ID. With DomainKeys/DKIM the integrity of the content is also protected and authentication does not break when emails are being forwarded. DomainKeys/DKIM is used by large webmail providers such as Google, Yahoo and AOL. […]

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Categories: General, PowerMTA

Hotmail throttling and PowerMTA

Windows Live Hotmail is famous for throttling senders based on their IP reputation. The following two SMTP errors might be familiar: 421 PR(ct1) The mail server IP connecting to Windows Live Hotmail server has exceeded the connection limit allowed. If you are not an email/network admin please contact your E-mail/Internet Service Provider for help. For […]

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Categories: PowerMTA